Bryce Miller coming back should feel like a clean win for the Mariners. According to Adam Jude of The Seattle Times , Miller says he is ready to rejoin the Mariners rotation “pronto,” and the club is leaning toward activating him during the current road trip, per sources. That should be a clean win for Seattle. However, his looming activation is about to shove Seattle into one of those roster conversations that sounds like a good problem until the team actually has to solve it. Luis Castillo has not looked like the automatic answer Seattle is used to trusting. Emerson Hancock has done enough to complicate the easy path. Logan Gilbert, George Kirby and Bryan Woo are not going anywhere. So now the Mariners have to decide whether they want the safest solution, the cleanest roster solution or the boldest one. Those are not all the same thing. Mariners’ Likeliest Rotation Move After Bryce Miller Return Is Also the Safest 1.…